Decomposition of Gaseous Sulfide Compounds in Air by Pulsed Corona Discharge

Abstract

The effectiveness of applying a pulsed corona discharge to the destruction of olfactory pollution in air was investigated. This paper presents a comparative study of the decomposition of three representative sulfide compounds in diluted concentrations: hydrogen sulfide (H 2 S), dimethyl sulfide (DMS), and ethanethiol (C 2 H 5 SH), which could be completely removed when a sufficient but reasonable energy density was deposited in the gas. DMS showed the lowest energy cost (around 30 eV/molecules); C 2 H 5 SH and H 2 S had an EC of respectively 45 eV and 115 eV. The efficiency of the non-thermal plasma process increased with decreasing the initial concentration of sulfide compounds, while the energy yield remained almost unchanged. SO 2 was the only identified byproduct of H 2 S decomposition, but the sulfur balance suggests the formation of undetected SO 3 . The byproducts analyzed during the degradation of DMS and C 2 H 5 SH enabled to propose a reaction mechanism, starting with radical attack and breaking of C-S bonds.

Efficient new process for the desulfurization of mixtures of air and hydrogen sulfide via a dielectric barrier discharge plasma

“…22 The addition of O 2 further enhances the H 2 S removal rates via similar reaction pathways as for the Claus process. 23 The presence of oxygen, however, might well have a negative impact like the production of SO 2 and SO 3 for thermal 24,25 and non-thermal plasmas [26][27][28] as well as for combinations of plasma and photolysis. 29 Thus, some groups even use the ozone downstream of a plasma discharge.…”

Plasma Supported Odour Removal from Waste Air in Water Treatment Plants: An Industrial Case Study

“…A comparative study of the decomposition of H 2 S, DMS and ethanethiol (C 2 H 5 SH) was presented by Jarrige and Vervisch (Jarrige and Vervisch, 2007). All three pollutants could be completely removed when a sufficient energy density was deposited in the plasma.…”

“…SO 2 was the only identified by-product of H 2 S decomposition, but the sulphur balance suggested the formation of undetected SO 3 . The by-products analysed during the degradation of DMS and C 2 H 5 SH enabled to propose a reaction mechanism, starting with radical attack and breaking of C-S bonds (Jarrige and Vervisch, 2007).…”

Oxidation of toluene by dielectric barrier discharge with photo-catalytic electrode

“…Many studies on removal of VOCs by NTP have been performed under different conditions such as target molecules, gas composition, reactor type and geometry, type of power supply, etc. [9][10][11][12][13][14][15][16][17][18][19][20]. For the practical application, it is also important to control the product of the VOCs after treatment by NTP.…”